数据导出excel

/**
	 * exportExcel($data,$title,$filename);
    * 导出数据为excel表格
    *@param $data    一个二维数组,结构如同从数据库查出来的数组
    *@param $title   excel的第一行标题,一个数组,如果为空则没有标题
    *@param $filename 下载的文件名
    *@examlpe 
    exportExcel($arr,array('id','账户','密码','昵称'),'文件名!');
*/
    static public function exportExcel($data=array(),$title=array(),$filename='report')
	{
		header("Content-type:application/octet-stream");
		header("Accept-Ranges:bytes");
		header("Content-type:application/vnd.ms-excel");  
		header("Content-Disposition:attachment;filename=".$filename.".xls");
		header("Pragma: no-cache");
		header("Expires: 0");
		//导出xls开始
		if (!empty($title))
		{
			foreach ($title as $k => $v)
			{
				$title[$k]=iconv("UTF-8", "GB2312",$v);
			}
			$title= implode("\t", $title);
			echo "$title\n";
		}
		if (!empty($data))
		{
			foreach($data as $key=>$val)
			{
				foreach ($val as $ck => $cv)
				{
					$data[$key][$ck]=iconv("UTF-8", "GB2312", $cv);
				}
			 $data[$key]=implode("\t", $data[$key]);      
			}
			echo implode("\n",$data);
		}
	}